Earth-moving apparatus



Juy 4, 1950 M. E. wooo 2,513,700

EARTH MOVING APPARATUS July 4, 1950 M. E. WOOD 2,513,700

EARTH MOVING APPARATUS Filed July 12, 1946 4 Sheets-Sheet 2 `Iuly 4, 1950 M. E. wooD 2,513,700

EARTH MOVING APPARATUS Filed July 12, 1946 4 Sheets-Sheet 3 Meek f. Wood July 4, 1950 M. E. wooD EARTH MOVING APPARATUS 4 Sheets-Sheet 4 Filed July l2, 1946 s lys? "wl 6 no .DOE 9 1C, gglL Qnwwwkm: Meek E Wood Patented July 4, 1950 UNITED STATES PATENT OFFICE ,EARTH MOVING APPARATUS lteekEveriitt Wood, llbert,k S. C,

Application J Illy 12, 1946, Serial-No-@G .5.Claims- 1 This invention `relates `to an improved bulldozer for attaching to tractors, and more espeially to a bulldozer which will not only .scrape the earth, but will deposit it in atsuitable .pan carried by the bulldozer, and thus collect a large load of dirt, or other material, to be dumped at a selected point.

It is an object of this inventionto provide a bulldozer attachment for tractors, which not only will carry a large load of dirt, or other material, but which load will not have a tendency to make the bladeof the bulldozer digdeeper and deeper into the soil, or to cut to a lesser and lesser depth, due to the weight of the load.

It isanother object of this invention to provide a bulldozer attachment vfor tractors, wherein the bulldozer blade has associated therewith, an earth carrying pan, and the bulldozer blade is xedly secured to a pivoted frame projecting from the front en d of the tractor, and the position of this pivoted frame can be regulated with relation to the ground, and the bulldozer blade and pan associated therewith carries supporting means, for supportingthe pan and blade independently of the swinging frame, so that as dirt is deposited into the pan back of the blade, the weight of the dirt will not cause the blade to dig deeper and deeperinto the soil, but this blade can'be regulated 4as to depth of vcut by other controllable means within reach of the driver.

It is another object of this invention to provide a bulldozer frame pivotally secured to a tractor and projecting forwardly thereof, with raising and lowering means driven by the tractor, for raising and lowering thevf'ront end of the frame, as desired, with relation tothe ground, the end of said pivoted frame having flxedly. mounted therein a bulldozer blade andan earth carrying pan associated therewith, and the pan being pivotally supported near the vblade and suitably supported by rollers, wheels, skidsor the like, sothat the weight of the earth, carried by the pan associated with the blade, will nothave a tendency to change the .positionof the blade relative to the frame to cause it to vcut deeper 0r ,ShallOWerl-When .$11.911 1S not. desired. Means are also provided whereby the position of the blade can be controlled by the driver of the tractor, andxvhen desire.d,the contents of the pan, associated with `the blade, Vcan be entirely dumped from the pan, all v`by means controlled by the driver of the tractor.

Some of the objects c.of the invention vhaving been stated, other objects will appear ,as the dev seriptcn proceeds, when taken in connection with the (accompanying drawings, in which-.-

Figure lis a -fsideelevation of the invention attached to ,a conventional track laying tractor;

Figure ,2 is@ @D PlafDVieW'Qf .Fgimfe 1? Figure 3 a `frontelevation of the bulldozer attachment;

Figure 4 is a vertical sectional view taken sub,- `stantially along .the line li-ell-inrvFigure 3;

Figure 5 is a top planview, with-parts secr tion, @fthe frontndef the bulldozer attachrnent, v.and showing ya inodied form of ,support for the pan; f l

Figure 6 is a .vertical sectional view taken substantially along the ,line 5-6 in Figure 5;

Figure l-is top plan view, with parts insee-,- tiva 0fy the front end 0i the bulldQZer attachr ment, and showing-another means of support lfor vthe pan;

Figure' is a sectional view taken substantially Aalong the line ,8f-.8 in Figure 7.

Referring -more specifically to the drawings, the `,nulrnt-,ral 1.0 indicates Conventional track laying tractor, having y,endless tracks I l and ,1,2 and side plates kH :-and Mdisposed on thenexterior of said endless tracks. The endless tracks are mountedon driving wheels, such as lgand IG, disposed on each side of and -at each `end ofthe tractor. This conventional tractor has shift levers l1 and I8, one for controllingthe movement of one Vendless track, and y.the .other for controlling the movement-ofthe othervend less track, whereby the --tractor can be directed in .its course. --Thistractor also has levers 2- 0 andrZl for imparting rotation `tovsuitable drums 22 and -23, `disposed in housings l24 and A25 respectively.

This conventional bulldozer tractor has ,secured on either side at its forward end vertical channel members .21 vand mounted at the frearward end upwardly and inwardly extended mem-1 bers 28. Connected to the top ends of channel members 21 is a channel member-3l to which an I-bearn 29 is secured .which extends rear.;- wardly and ris secured to members 28. Suitable channel struts` 30 are also provided for bracing the superstructure comprising members 21, 28, and 29. On top of the superstructure, there is mounteda ,pair of ,ttings .33 and 34, iin which pulleys 3.5., 3.5, 31 and .t8 are lrotatalolv,nwurltest Thdrum .2..2 has .Wound therearound a suitable cablelll), whichpasses upwardly over ypulley $8, anderer pulley, to the frontpf the tracton Drum @has Wouedfthereon a conventionallcahle front ends thereof vertical channel members 56 and and spanning the distance between the upper ends of channel members 58 and 5| is a shaft 52, on which a pulley 53 is rotatably mounted, and over which cable 40 passes and is reversely directed, and is anchored to a suitable eye-bolt 55 secured to the channel member 3|.

Secured to the channel members 41 and 48 are channel members 56 and 51, which act as a brace to the channel members 56 and 5|. Spanning the distance between, and secured to the front inner edges of channels 41 and 48 is a channel i member 58, which completes the framework pivotally secured onto the tractor. n Secured between the outer ends of channel bars 41 and 48 is an elongated bolt 60, which penetrates a plurality of prongs 6|, which project rearwardly and are welded with their rear ends lto the front portion ofl the channel bar 58, and

to these prongs 6I is secured by means of suitable screws 62 a transverse cutting blade 63. In the" interstices between the members 6i prongs 64 ofV a catch and dump pan 65 are curled around ythe bolt or shaft 66. The members 6| and blade 63 therefore are an integral part of the framework comprising side bars 41 and 48 and uprights 56 and 5|. The catch and drag pan 65 projects upwardly and rearwardly and then forwardly and has a itting 66 to which an eye-member 61 is secured, which eye-member is attached to the end.' of cable 42. Welded to the proximate surfaces of the uprights 50 and 5I and to the proximate surfaces of braces 56 and 51 and tothe proximate surfaces of side channels41 and 48 `are plates 10 and 1|, with which the ends of the `catch .and drag pan 65 have sliding contact. Securedto the front upper portions of these sideplates10 and 1| are fittings 13 and 14, as by means of bolts 15. Mounted in the short channel members 13 and 14 is a transverse elongated bolt or shaft 11 on which is rotatably mounted a pulley 18 over which the cable 42 passes on its way to its connection with the upper front edge of the catch and dump pan 65.

The lower portion of the catch and dump pan 65 has a pair of openings 80 and 8|,which are covered by suitable curved concavo-convex plates 82 and 83. Secured on the lower surface of the pan 65 are bearing members 86, 81, 88, and 89 respectively are supporting the drag pan in association with bolt or shaft 60.

If desired, instead of the individual wheels 92, there may be a, plurality of bearings 84 having a shaft 95 passing therethrough, on which rollers 96 and 91 may be mounted for supporting the pan in lieu of the wheels 92. Or if desired, suitable skids 98 may be suitably bolted, as at 96,

`to the lower surface of the pan 65 for supporting the same in conjunction with rod 66. l Method of operation When it is desired to ll the catch and drag pan` 65 the cable 42 is taken up by the winch drum 23, to move the wheels 92 upwardly slightly inv relation to the side channel members 41 and 48 to thus permit the side channel members '41 and 48 to be lowered suii'iciently so that the lower 4 edge of the blade 63 may be raised or lowered to any desired elevation to properly engage the material to be moved. Now, in order to raise or lower the blade 63 disposed at the free ends of the side channel members 41 and 48, it is necessary to take up or let off, as the case may be, on the cable 40 by rotating the winch drum 22 in the desired direction. It is obvious in Figure 1 that to let off on the cable 40 when cable 42 is slack would permit the blade 63 with associated parts to move downwardly by gravity inasmuch as the wheels 92 would not be supporting the shaft 60 and the side channel members 41 and 48 are pivoted at 45 and 46. Conversely, by taking up on the cable 46, the blade 63 would be raised, and by letting off on the cable 42, the wheels 92 may be moved downwardly by gravity while the blade 63 moves upwardly. The Weight of the material being moved holds the wheels 92 on the ground when the cable 42 is let on, The blade 63 is not only urged downwardly by the weight of associated parts, but also by resistance of the material which it is adapted to move. In the drawings and specification, there has been set forth a preferred embodiment ci the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

I claimt l. A bulldozer attachment for tractors comprising a pair of side members having their rear ends pivotally secured to the tractor, a blade secured between the front ends of the side members, a rearwardly, upwardly and forwardly projecting pan having its lower front portion pivotally secured to the blade, means secured to the lower surface of the pan and disposed rearwardly of the blade for supporting the pan from the ground, means mounted on the tractor and extending to and connected to the front ends of the side members for raising and lowering the side members, other means mounted on the tractor, and secured to the upper forward portion of the pan for moving the pan on its pivot to dump the contents of the pan asdesired.

2. In a tractor having a superstructure on which a plurality of pulleys are mounted, power driven means comprising drums around each of which a cable is wound, said cables extending forwardly over the superstructure and lbeing mounted on said pulleys, a pair or side members having their rear ends pivotally secured on each side of the tractor and projecting forwardly of the tractor, a scraping blade secured to and spanning the distance between the front ends of the side members, a rearwardly then upwardly, then forwardly projecting pan pivotally secured to the rear portion of the blade, means for connecting one of .the cables to the front end of the side members for raising and lowering the same, and means for connecting the front end of the other cable to the pan for pivoting the pan on its pivot to dump the contents of the pan as desired, supporting means secured to the lower surface of the pan rearwardly of its pivot' for supporting the pan from the ground.y v

3. A bulldozer attachment for a tractor, said tractor having a superstructure on which a plurality of pulleys are mounted, and said tractor having a pair of power driven drums, each having a cableattached thereto, said cables extending up over the superstructure and forwardly of the tractor and supported by said pulleys, a pair of spanning the distance therebetween, a dirt receiving pan pivotally secured to the member extending between the front ends of the side membersl and extending rearwardly. upwardly and forwardly, ground-engaging supporting means secured to the lower surface of the pan rearwardly of its pivot point, a pair of side plates secured to the uprights extending upwardly from the front ends of the side members, a shaft secured to the front upper ends of the side plates and spanning l the distance therebetween; a pulley mounted on said shaft, the cable from one of the ldrums extending over the rst mentioned pulley and having its front end anchored to the superstructure,

the other cable extending over the last-named pulley and having its front end secured to the upper forwardly projecting portion of the pan.

4. A bulldozer attachment for a tractor, said tractor having a superstructure on which a plurality of pulleys are mounted, and said tractor having a pair of power driven drums, each having a cable attached thereto, said cables extending up over the superstructure and forwardly of the tractor and supported by said pulleys, a pair of side members having their rear ends pivotally secured to the sides of the tractor and projecting forwardly of the tractor, a cross piece secured to the front ends of the side members and spanning the distance theerbetween. uprights secured to the front ends of the side members and having a member secured to and extending between their upper ends, a pulley mounted on said lastnamed member, a scraping blade mounted 'between the front ends of the side member and spanning the distance therebetween, a dirt receiving pan pivotally secured to the member extending between the front ends of the side members and extending rearwardly, upwardly and forwardly, ground-engaging supporting means secured to the lower surface of the pan rearwardly of its pivot point, a pair of side plates secured to the uprights extending upwardly from the front ends of the side members, a shaft secured to the front upper ends of the side plates and spanning the distance therebetween; a pulley mounted on said shaft, the cable from one of the drums extending over the rst mentioned pulley and having its front end anchored to the superstructure, the other cable extending over the last-named pulley and having its front end secured to the upper forwardly projecting portion of the pan, the lower surface of the pan having ground-engaging supporting means independent of the superstructure secured thereto, said supporting means being f disposed rearwardly of the pivot point of the pan.

5. A bulldozer attachment for tractors comprising a framework extending forwardly of the tractor and having its rear end pivotally connected to the tractor, a scraping blade mounted on the front end of the framework, an earth receiving pan pivotally secured to the upper rear l portion of the blade and extending rearwardly and upwardly, ground engaging supporting means carried by the pan, a vertically disposed plate secured on the framework at each side of the pan, means driven by the tractor for raising the front end of the framework, other means driven by the tractor for pivoting the pan forwardly to dump the contents therefrom,the lower surface of the pan having supporting means secured thereto, said supporting means being disposed rearwardly of the pivot point of the pan.

MEEK EVERITT WOOD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

